It is wealthier and has fewer artistic/intellectual types. Both areas are about 30% Jewish - the days of wealthy Jews preferring the UWS because the UES is too WASP/exclusive are long over.
Yeah, basically.
I think that, at least in our Northeastern urban cores, the latte liberalism of a Park Slope or a UWS is more the norm than the exception. But, sure, when you cross the line from the "merely affluent" 2% of Park Slope to the "stinkin' rich" 0.02% of the Upper East Side, then yes, things change. In large part because, in comparison to that "stinkin' rich," the denizens of your Park Slopes don't
feel rich.
Even if they are, by any less myopic standard.